Install Sway on Debian Jessie

install-sway-debian-8.x.bash

#!/bin/bash

#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    A copy of the GNU General Public License can be found at <http://www.gnu.org/licenses/>.


# Proof-of-concept installation script for sway on debian 8.x ("jessie")
# on an amd64 pc. debian jessie is the current "debian stable"

# this can be run as a script, but bash is fragile and this may not
# work depending on the particularities of your setup, so I would suggest
# just treating it as a guide so if at some point something doesn't
# work at one step of a process, it's very clear where and why.

main() {
    asRoot
    getRecentCmake
    getRecentWayland
    installWlc
    installSway
}

getRecentCmake() {    
    # cmake from website is statically linked
    # whereas installing it from stretch means installing dynamic
    # libs as well as upgrading packages that the newer version
    # may make use of the newer cmake, but the newer version
    # is not necessary to install sway. e.g. libreoffice.
    if [[ -e /usr/bin/cmake && ! `cmake --version | grep -i 3.0` ]]; then return 0; fi 
    log 1 "getting recent Cmake (stable+backports has 3.0.2, 3.1 is expected)"
    CMAKE_URL=https://cmake.org/files/v3.3/cmake-3.3.2-Linux-x86_64.tar.gz
    CMAKE_ARCHIVE=`basename $CMAKE_URL`
    mkdtmp dirCmake
    log 2 "downloading ... this may take several seconds."
    wget -q $CMAKE_URL -O $dirCmake/$CMAKE_ARCHIVE
    tar xf  $dirCmake/$CMAKE_ARCHIVE -C $dirCmake
    log 2 "extracting"    
    extractedTo=$dirCmake/`basename $CMAKE_ARCHIVE .tar.gz`
    cp -R  $extractedTo/* /
    cp -R  $extractedTo/bin/* /usr/bin/
    for f in cmake ccmake cpack cpack-gui ctest;
    do
        rm -f /usr/bin/$f
        ln -s /bin/$f /usr/bin/$f
    done
    cd /tmp
    rm -r $dirCmake   
}

getRecentWayland() {
    # You will need a newer version, or the cmake will pass but the
    # make will fail as the code will not compile correctly.

    #if we already have a recent enough version, skip.
    waylandHeader=/usr/include/wayland-server-protocol.h
    if [[ -e $waylandHeader && `grep -Ei "release.*data device" $waylandHeader` ]]; then return 0; fi
    
    log 1 "getting recent Wayland (stable+backports has 1.6, 1.9 is expected) and other Wlc dependencies as needed"
    echo "deb http://http.debian.net/debian stretch main contrib" > /etc/apt/sources.list.d/stretch.list
    log 2 "adding debian stretch repo and running apt-get update"
    apt-get -qq update
    # libdrm is not part of wayland, but a more recent version is also
    # required by wlc, so it's also fetched here.
    log 2 "installing packages"
    apt-get -qqy install libgles2-mesa-dev libdrm2 libdrm-dev libegl1-mesa-dev xwayland || exit 1
    rm /etc/apt/sources.list.d/stretch.list
    log 2 "rm debian stretch repo and running apt-get update"
    apt-get -qqy update
}

installWlc() {

    #if we already have wlc we can skip this.
    if [ -e /usr/include/wlc ]; then return 0; fi
    
    log 1 "getting WLC"
    mkdtmp dirWlc
    while [ ! -e $dirWlc ]; do
        sleep 0.01
    done
    log 2 "cloning repo"    
    git clone --quiet https://github.com/Cloudef/wlc.git $dirWlc
    cd $dirWlc
    git submodule update --quiet --init --recursive || exit 1
    log 2 "installing dependencies for which only trusty v. is req'd "    
    apt-get -qqy install build-essential libinput5 libinput-dev libxkbcommon0 libxkbcommon-dev libudev-dev libxcb-ewmh-dev libxcb-image0 libxcb-image0-dev libxcb-composite0 libxcb-composite0-dev libxcb-xkb1 libxcb-xkb-dev libgbm1 libgbm-dev libdbus-1-dev libsystemd-dev zlib1g-dev libpixman-1-dev || exit 1
    mkdir target
    cd target
    log 2 "configuring"
    export errlog=`cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/ .. 2>&1` || dumpErrlog
    log 2 "compiling and installing "    
    export errlog=`make 2>&1 && make install 2>&1` || dumpErrlog
    cd /tmp
    rm -r $dirWlc
}

installSway() {
    # we don't do an idempotency check here because we're assuming
    # a user would only run this script if they to install the latest
    # version of sway. Making a script that was both idempotent
    # and allowed for easy upgrading of sway would require the
    # use of args or env. variables; it's a complexity tradeoff.

    log 1 "getting Sway"    
    mkdtmp dirSway
    while [ ! -e $dirSway ]; do
        sleep 0.01
    done
    log 2 "cloning repo"    
    git clone --quiet https://github.com/SirCmpwn/sway.git $dirSway
    log 2 "installing dependencies"
    apt-get -qqy install libpcre3 libpcre3-dev libcairo2 libcairo2-dev libpango1.0-0 libpango1.0-dev asciidoc libjson-c2 libjson-c-dev || exit $?
    log 2 "configuring"
    cd ${dirSway}
    export errlog=`cmake ${dirSway} . 2>&1` || dumpErrlog
    log 2 "compiling and installing "        
    export errlog=`make 2>&1 && make install 2>&1` || dumpErrlog
    log 1 "complete. as your regular username (not root) please create your sway config"
    log 1 "if you have never used i3 or sway copy /etc/sway/config to ~/.config/sway/config/ (you may need to make the directory first) "
    log 1 "if you have used i3 and have a config, copy ~/.i3/config to ~/.config/sway/config/ (you may need to make the directory first) "
    cd /tmp
    rm -r $dirSway
}

dumpErrlog() {
    echo -e $errlog
    exit 1
}

log() {
    i=0;
    while [ $i -lt $1 ]; do
        printf "\t"
        i=`expr $i + 1`
    done
    echo -ne "$2\n"
}

asRoot() {
    #in most cases to install systemwide you will need root privileges
    if [ `whoami` != "root" ];
    then
        echo "error: you must run this script as root"; exit 1;
    fi
}

mkdtmp() {
    # utility function used by other functions to create temporary directories
    # in tmp to avoid name conflicts
    local -n l=$1;
    l=`mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir'`;
}

main $@

@nathanross I have written an installation guide in which I have used some commands from your script. I hope this is okay with you. Also I would like to add that CMake refused to generate the Makefiles for Wlc until I installed the lib-xcb-emwh-dev package. You might want to add this package as a dependency.

@leon-vv, perfectly fine, and thank you for the heads-up about the library. I've added it to the script.

This script doesn't work because libgbm1 is a higher version than libgbm-dev, and both are trying to be installed.

To fix this, simple remove libgbm-dev from the install list in WLC, as I made to my fork.